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Finding the Fourth Proportional to 1,536.81, 2,121.02 and 873.53

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Solution

The fourth proportional to 1,536.81, 2,121.02 and 873.53 is: 1,205.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,536.81 : 2,121.02 = 873.53 : x
  2. Step 2: Convert to fraction form
    1,536.81/2,121.02 = 873.53/x
  3. Step 3: Cross multiply
    1,536.81x = 2,121.02 × 873.53
  4. Step 4: Simplify right side
    1,536.81x = 1,852,759.63
  5. Step 5: Solve for x
    x = 1,852,759.63/1,536.81
  6. Step 6: Final answer
    x = 1,205.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.